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Finding the Fourth Proportional to 159,969.08, 220,744.50 and 91,982.54

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Solution

The fourth proportional to 159,969.08, 220,744.50 and 91,982.54 is: 126,928.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,969.08 : 220,744.50 = 91,982.54 : x
  2. Step 2: Convert to fraction form
    159,969.08/220,744.50 = 91,982.54/x
  3. Step 3: Cross multiply
    159,969.08x = 220,744.50 × 91,982.54
  4. Step 4: Simplify right side
    159,969.08x = 20,304,639,801.03
  5. Step 5: Solve for x
    x = 20,304,639,801.03/159,969.08
  6. Step 6: Final answer
    x = 126,928.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.